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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
40% (02:05) correct
60%
(02:12)
wrong
based on 146
sessions
History
Date
Time
Result
Not Attempted Yet
Mangrove forests can be found in freshwater or in saltwater with salinity up to 2.5 times that of seawater; however, mangrove trees cannot thrive in freshwater habitats unless there is no competition from other trees. This suggests that a mangrove’s only competitive edge vis-à-vis other trees in its habitats is its higher tolerance of salinity.
Which of the following assumptions is necessary to support the conclusion about a mangrove’s competitiveness?
(A) No tree has a higher salinity tolerance than the mangrove.
(B) Competitors with equal salinity tolerance to the mangrove will win out.
(C) Mangroves are more likely to be found in saltwater than in freshwater.
(D) Mangrove trees could never thrive among competitors with greater tolerance to salinity.
(E) A mangrove can thrive against competition in saltwater.
Which of the following assumptions is necessary to support the conclusion about a mangrove’s competitiveness?
(A) No tree has a higher salinity tolerance than the mangrove.
(B) Competitors with equal salinity tolerance to the mangrove will win out.
(C) Mangroves are more likely to be found in saltwater than in freshwater.
(D) Mangrove trees could never thrive among competitors with greater tolerance to salinity.
(E) A mangrove can thrive against competition in saltwater.
02 Jun 2023, 06:15
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Best answer: (D)
Identify the conclusion and the premise(s):
Premise: Mangrove forests can be found in freshwater or in saltwater with salinity up to 2.5 times that of seawater.
Premise: Mangrove trees cannot thrive in freshwater habitats unless there is no competition from other trees.
Conclusion: A mangrove’s only competitive edge vis-à-vis other trees is its higher tolerance of salinity.
Explanations:
Identify question type and give some tips:
It seems obvious that the mangrove has no competitive edge against other trees that can grow in freshwater environments, but the leap to the conclusion is actually quite high: that its only competitive edge in saltwater is its tolerance to salinity as well. The correct answer choice will reflect a necessary component of this lofty assumption.
Scan each answer choice by eliminating progressively each “wrong” answer to finish with the “best” answer:
If a mangrove’s only competitive edge vis-à-vis is its tolerance to salinity, it seems impossible for it to thrive against any other tree with a higher tolerance, and so (D) is the correct answer. (B) might seem correct, but perhaps no other trees with an equal level of salinity tolerance have any other advantage; in this case, no one would “win out.” (A) is too extreme; a mangrove need not be competitive against all trees to be competitive against any of them. (E) assumes that some saltwater trees do not in fact have higher net advantages than the mangrove. Incidence of mangroves is beyond the scope of the question, ruling out (C).
Identify the conclusion and the premise(s):
Premise: Mangrove forests can be found in freshwater or in saltwater with salinity up to 2.5 times that of seawater.
Premise: Mangrove trees cannot thrive in freshwater habitats unless there is no competition from other trees.
Conclusion: A mangrove’s only competitive edge vis-à-vis other trees is its higher tolerance of salinity.
Explanations:
Identify question type and give some tips:
It seems obvious that the mangrove has no competitive edge against other trees that can grow in freshwater environments, but the leap to the conclusion is actually quite high: that its only competitive edge in saltwater is its tolerance to salinity as well. The correct answer choice will reflect a necessary component of this lofty assumption.
Scan each answer choice by eliminating progressively each “wrong” answer to finish with the “best” answer:
If a mangrove’s only competitive edge vis-à-vis is its tolerance to salinity, it seems impossible for it to thrive against any other tree with a higher tolerance, and so (D) is the correct answer. (B) might seem correct, but perhaps no other trees with an equal level of salinity tolerance have any other advantage; in this case, no one would “win out.” (A) is too extreme; a mangrove need not be competitive against all trees to be competitive against any of them. (E) assumes that some saltwater trees do not in fact have higher net advantages than the mangrove. Incidence of mangroves is beyond the scope of the question, ruling out (C).
25 Dec 2024, 02:50
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